2012
DOI: 10.1021/la3005757
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Structure of [C4mpyr][NTf2] Room-Temperature Ionic Liquid at Charged Gold Interfaces

Abstract: The structure of 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide ([C(4)mpyr][NTf(2)]) room-temperature ionic liquid at an electrified gold interface was studied using neutron reflectometry, cyclic voltammetry, and differential capacitance measurements. Subtle differences were observed between the reflectivity data collected on a gold electrode at three different applied potentials. Detailed analysis of the fitted reflectivity data reveals an excess of [C(4)mpyr](+) at the interface, with the am… Show more

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Cited by 109 publications
(134 citation statements)
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References 63 publications
(105 reference statements)
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“…In previous studies, observations of similar structures were associated with the lattice saturation effect and the maximum of the differential capacitance curve (C diff vs. U). 30 However, Fig. 2 shows that within a distance of 1.7 nm from the electrode, there are also co-ions coordinated with several (2 to 4) counter- ions.…”
Section: Molecular-scale Structural Reorganizationmentioning
confidence: 98%
“…In previous studies, observations of similar structures were associated with the lattice saturation effect and the maximum of the differential capacitance curve (C diff vs. U). 30 However, Fig. 2 shows that within a distance of 1.7 nm from the electrode, there are also co-ions coordinated with several (2 to 4) counter- ions.…”
Section: Molecular-scale Structural Reorganizationmentioning
confidence: 98%
“…Some researchers have suggested the interplay between electrostatic interactions and steric hindrance at the interfaces. 15 Some studies also indicated that the abilities of a To whom correspondence should be addressed. E-mail: hcchang@mail.ndhu.edu.tw; Fax: +886-3-8633570; Phone: +886-3-8633585…”
Section: Introductionmentioning
confidence: 99%
“…21 The ordering of ionic liquids at solid surface is a subject of recent intense activities. [10][11][12][13][14][15] Based on these studies, solvation layers are found at the solid-ionic liquid interfaces for various ionic liquids. [10][11][12][13][14][15] As a matter of fact, ionic liquid may not be regarded as homogeneous solvent but must be considered as nano-structured with polar and nonpolar regions.…”
Section: Introductionmentioning
confidence: 99%
“…There have been a number of related NR studies with in situ electrochemistry addressing an interesting range of challenges such as battery electrodes [107][108][109][110][111], solid electrolyte interface SEI formation [84], electroactive polymer films [112][113][114] and other double layer capacitance systems, such as ionic liquids at surfaces [56,115,116], as well as the formation and properties of passivating oxide layers [68,91,100].…”
Section: Electrochemicalmentioning
confidence: 99%
“…Interestingly, they found there remained a cation surface excess even when the surface was positively charged, although at a lower concentration than when negatively charged. They ascribed this to the specific adsorption of the cation overcoming the electrostatic effects [115,116].…”
Section: Ionic Liquidsmentioning
confidence: 99%